motor trouble
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Junior User
Joined: Jul 2003
Posts: 60
Likes: 0
motor trouble
I have a 1986 Ford F-150 with 5.8L 4VH.O., ONLY 60,000 original miles. The engine runs so smooth at idle, never rough, but when I get going down the road, even when it's all warmed up stomp the gas and it does not want to go like it is suppose to. It like it's want to hesitate. It's like it wants to jerk itself off or something. I don't understand this as it runs so good if it is just idling or you just gradually increase accelerator. But when you give the gas very fast it does this. I just cut the catalytic off thinking they were the cause but it still does this. I noticed though when I took it down the road with the converters off and no muffler that when you give it the gas and let off it sometimes wants to POP REAL LOUD. Is this normal or might this be a BACKFIRE? I did have the carburetor rebuilt about 3 years ago.
Elder User
Joined: Oct 2002
Posts: 513
Likes: 0
From: Lincoln NE
motor trouble
My 351w HO only gets 10-11 and there's nothing wrong with it and it's got 115K on it. You may see a small rise in your fuel milaege because you took the cat out. Basically, the less resistance for your exhaust, the better fuel mileage, unless you put on small pipes, like anything less than 2.5 inches. I don't know what would be causing your popping though.
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
motor trouble
Okay - starving for gas doesn't mean that its getting less gasoline - what I should have said is...hey, archangel? you there?...is starving for fuel. Fuel is gas/air mix. Maybe the pump is bad in the carb not allowing the right mixture. That's what it sounds like to me. If starving for gas (fuel) would help your gas mileage I think I would kink a line or two on my V10. Had this to happen once on an older truck I had. It made we want to run it to the nearest auto shop eveytime I got in it. Idled great but would just lose power going to WOT.
Just my opinion is all.
Just my opinion is all.
